This easy-to-fit Thermal Hot Tub Cover improves heat retention due to the thermal insulation making it up to 50% more energy efficient keeping you spa protected, whenever you're not buy relaxing in it! With improved energy efficiency, using your hot tub all year round couldn’t be easier, and is now more viable. Save energy while maintaining your hot tub's warm temperatures with the CleverSpa Universal Thermal Cover that is made to fit all spas up to... This CleverSpa Thermal Cover For Hot Tubs is an easy to fit cover that is waterproof as well as UPF 50, providing protection from extreme weather conditions. With webbing straps & a safety locking clip, it will fit securely and ensure that more heat is retained through thermal insulation, meaning it will take less time to heat up when you next go for a soak. With improved energy efficiency, using your hot tub all year round couldn't be easier!